83 overspeed limit – Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty User Manual

Page 50

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4-18

LiquiFlo 1.5 AC Drive, Software Reference Version 1.2

Sets the incremental amount of the output frequency (above Maximum Speed)
allowable for functions such as slip compensation. See figure 4.6

Maximum Speed + Overspeed Limit must be

to Maximum Frequency

Sets a frequency at which the drive will not operate (also called an avoidance
frequency
). Requires that both Skip Frequency 1-3 and Skip Frequency Band (87) be
set to a value other than 0.

83

Overspeed Limit

Range:

0.0 to 20.0 Hz [0.1 Hz]

Default:

10.0 Hz

Access:

1

Path: Speed Command>Spd Mode & Limits

See also:

55, 82

Figure 4.6 – Speed Limits

Allowable Output Frequency Range

Bus Regulation or Current Limit

V

o

l

t

a

g

e

Frequency

Allowable Output Frequency Range

Normal Operation

Allowable Reference Frequency Range

Frequency Trim due to
Speed Control Mode

Max Volts

Motor Volts

Break Volts

Start Boost

Run

0

Min

Speed

Motor

Hz

Max

Speed

Output

Freq Limit

Max
Freq

Break

Frequency

Overspeed

Limit

84
85
86

Skip Frequency 1
Skip Frequency 2
Skip Frequency 3

Range:

0.0 to 250.0 [0.1 Hz]

Default:

0.0 Hz

Access:

1

Path: Speed Command>Spd Mode & Limits

See also:

87

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